the problem with that one is it uses averages and the 2 Hemi Cudas that suprassed $2mill each completely skews the results. show me one /6 (not converted to a v8) that brought anything close to the $57,700 average they show.
After studying the yearly sales charts at the bottom it appears on either of these models there's an outlier that comes along to skew the numbers every few years, neither have enough activity to make any generalizations about values or trends IMO.
As well they tend to lump many models together in some searches...